Theme Developer Handbook. * * @since 1.5.0 * * @see is_category() * @see is_tag() * @see is_author() * @see is_date() * @see is_post_type_archive() * @see is_tax() * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is for an existing archive page. */ function is_archive() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_archive(); } /** * Determines whether the query is for an existing post type archive page. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 3.1.0 * * @global WP_Query $wp_query WordPress Query object. * * @param string|string[] $post_types Optional. Post type or array of posts types * to check against. Default empty. * @return bool Whether the query is for an existing post type archive page. */ function is_post_type_archive( $post_types = '' ) { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_post_type_archive( $post_types ); } /** * Determines whether the query is for an existing attachment page. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 2.0.0 * * @global WP_Query $wp_query WordPress Query object. * * @param int|string|int[]|string[] $attachment Optional. Attachment ID, title, slug, or array of such * to check against. Default empty. * @return bool Whether the query is for an existing attachment page. */ function is_attachment( $attachment = '' ) { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_attachment( $attachment ); } /** * Determines whether the query is for an existing author archive page. * * If the $author parameter is specified, this function will additionally * check if the query is for one of the authors specified. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. * * @param int|string|int[]|string[] $author Optional. User ID, nickname, nicename, or array of such * to check against. Default empty. * @return bool Whether the query is for an existing author archive page. */ function is_author( $author = '' ) { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_author( $author ); } /** * Determines whether the query is for an existing category archive page. * * If the $category parameter is specified, this function will additionally * check if the query is for one of the categories specified. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. * * @param int|string|int[]|string[] $category Optional. Category ID, name, slug, or array of such * to check against. Default empty. * @return bool Whether the query is for an existing category archive page. */ function is_category( $category = '' ) { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_category( $category ); } /** * Determines whether the query is for an existing tag archive page. * * If the $tag parameter is specified, this function will additionally * check if the query is for one of the tags specified. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 2.3.0 * * @global WP_Query $wp_query WordPress Query object. * * @param int|string|int[]|string[] $tag Optional. Tag ID, name, slug, or array of such * to check against. Default empty. * @return bool Whether the query is for an existing tag archive page. */ function is_tag( $tag = '' ) { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_tag( $tag ); } /** * Determines whether the query is for an existing custom taxonomy archive page. * * If the $taxonomy parameter is specified, this function will additionally * check if the query is for that specific $taxonomy. * * If the $term parameter is specified in addition to the $taxonomy parameter, * this function will additionally check if the query is for one of the terms * specified. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 2.5.0 * * @global WP_Query $wp_query WordPress Query object. * * @param string|string[] $taxonomy Optional. Taxonomy slug or slugs to check against. * Default empty. * @param int|string|int[]|string[] $term Optional. Term ID, name, slug, or array of such * to check against. Default empty. * @return bool Whether the query is for an existing custom taxonomy archive page. * True for custom taxonomy archive pages, false for built-in taxonomies * (category and tag archives). */ function is_tax( $taxonomy = '', $term = '' ) { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_tax( $taxonomy, $term ); } /** * Determines whether the query is for an existing date archive. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is for an existing date archive. */ function is_date() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_date(); } /** * Determines whether the query is for an existing day archive. * * A conditional check to test whether the page is a date-based archive page displaying posts for the current day. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is for an existing day archive. */ function is_day() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_day(); } /** * Determines whether the query is for a feed. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. * * @param string|string[] $feeds Optional. Feed type or array of feed types * to check against. Default empty. * @return bool Whether the query is for a feed. */ function is_feed( $feeds = '' ) { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_feed( $feeds ); } /** * Is the query for a comments feed? * * @since 3.0.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is for a comments feed. */ function is_comment_feed() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_comment_feed(); } /** * Determines whether the query is for the front page of the site. * * This is for what is displayed at your site's main URL. * * Depends on the site's "Front page displays" Reading Settings 'show_on_front' and 'page_on_front'. * * If you set a static page for the front page of your site, this function will return * true when viewing that page. * * Otherwise the same as @see is_home() * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 2.5.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is for the front page of the site. */ function is_front_page() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_front_page(); } /** * Determines whether the query is for the blog homepage. * * The blog homepage is the page that shows the time-based blog content of the site. * * is_home() is dependent on the site's "Front page displays" Reading Settings 'show_on_front' * and 'page_for_posts'. * * If a static page is set for the front page of the site, this function will return true only * on the page you set as the "Posts page". * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 1.5.0 * * @see is_front_page() * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is for the blog homepage. */ function is_home() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_home(); } /** * Determines whether the query is for the Privacy Policy page. * * The Privacy Policy page is the page that shows the Privacy Policy content of the site. * * is_privacy_policy() is dependent on the site's "Change your Privacy Policy page" Privacy Settings 'wp_page_for_privacy_policy'. * * This function will return true only on the page you set as the "Privacy Policy page". * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 5.2.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is for the Privacy Policy page. */ function is_privacy_policy() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_privacy_policy(); } /** * Determines whether the query is for an existing month archive. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is for an existing month archive. */ function is_month() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_month(); } /** * Determines whether the query is for an existing single page. * * If the $page parameter is specified, this function will additionally * check if the query is for one of the pages specified. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 1.5.0 * * @see is_single() * @see is_singular() * @global WP_Query $wp_query WordPress Query object. * * @param int|string|int[]|string[] $page Optional. Page ID, title, slug, or array of such * to check against. Default empty. * @return bool Whether the query is for an existing single page. */ function is_page( $page = '' ) { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_page( $page ); } /** * Determines whether the query is for a paged result and not for the first page. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is for a paged result. */ function is_paged() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_paged(); } /** * Determines whether the query is for a post or page preview. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 2.0.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is for a post or page preview. */ function is_preview() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_preview(); } /** * Is the query for the robots.txt file? * * @since 2.1.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is for the robots.txt file. */ function is_robots() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_robots(); } /** * Is the query for the favicon.ico file? * * @since 5.4.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is for the favicon.ico file. */ function is_favicon() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_favicon(); } /** * Determines whether the query is for a search. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is for a search. */ function is_search() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_search(); } /** * Determines whether the query is for an existing single post. * * Works for any post type, except attachments and pages * * If the $post parameter is specified, this function will additionally * check if the query is for one of the Posts specified. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 1.5.0 * * @see is_page() * @see is_singular() * @global WP_Query $wp_query WordPress Query object. * * @param int|string|int[]|string[] $post Optional. Post ID, title, slug, or array of such * to check against. Default empty. * @return bool Whether the query is for an existing single post. */ function is_single( $post = '' ) { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_single( $post ); } /** * Determines whether the query is for an existing single post of any post type * (post, attachment, page, custom post types). * * If the $post_types parameter is specified, this function will additionally * check if the query is for one of the Posts Types specified. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 1.5.0 * * @see is_page() * @see is_single() * @global WP_Query $wp_query WordPress Query object. * * @param string|string[] $post_types Optional. Post type or array of post types * to check against. Default empty. * @return bool Whether the query is for an existing single post * or any of the given post types. */ function is_singular( $post_types = '' ) { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_singular( $post_types ); } /** * Determines whether the query is for a specific time. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is for a specific time. */ function is_time() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_time(); } /** * Determines whether the query is for a trackback endpoint call. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is for a trackback endpoint call. */ function is_trackback() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_trackback(); } /** * Determines whether the query is for an existing year archive. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is for an existing year archive. */ function is_year() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_year(); } /** * Determines whether the query has resulted in a 404 (returns no results). * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is a 404 error. */ function is_404() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_404(); } /** * Is the query for an embedded post? * * @since 4.4.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is for an embedded post. */ function is_embed() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' ); return false; } return $wp_query->is_embed(); } /** * Determines whether the query is the main query. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 3.3.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool Whether the query is the main query. */ function is_main_query() { global $wp_query; if ( ! isset( $wp_query ) ) { _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '6.1.0' ); return false; } if ( 'pre_get_posts' === current_filter() ) { _doing_it_wrong( __FUNCTION__, sprintf( /* translators: 1: pre_get_posts, 2: WP_Query->is_main_query(), 3: is_main_query(), 4: Documentation URL. */ __( 'In %1$s, use the %2$s method, not the %3$s function. See %4$s.' ), 'pre_get_posts', 'WP_Query->is_main_query()', 'is_main_query()', __( 'https://developer.wordpress.org/reference/functions/is_main_query/' ) ), '3.7.0' ); } return $wp_query->is_main_query(); } /* * The Loop. Post loop control. */ /** * Determines whether current WordPress query has posts to loop over. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool True if posts are available, false if end of the loop. */ function have_posts() { global $wp_query; if ( ! isset( $wp_query ) ) { return false; } return $wp_query->have_posts(); } /** * Determines whether the caller is in the Loop. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 2.0.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool True if caller is within loop, false if loop hasn't started or ended. */ function in_the_loop() { global $wp_query; if ( ! isset( $wp_query ) ) { return false; } return $wp_query->in_the_loop; } /** * Rewind the loop posts. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. */ function rewind_posts() { global $wp_query; if ( ! isset( $wp_query ) ) { return; } $wp_query->rewind_posts(); } /** * Iterate the post index in the loop. * * @since 1.5.0 * * @global WP_Query $wp_query WordPress Query object. */ function the_post() { global $wp_query; if ( ! isset( $wp_query ) ) { return; } $wp_query->the_post(); } /* * Comments loop. */ /** * Determines whether current WordPress query has comments to loop over. * * @since 2.2.0 * * @global WP_Query $wp_query WordPress Query object. * * @return bool True if comments are available, false if no more comments. */ function have_comments() { global $wp_query; if ( ! isset( $wp_query ) ) { return false; } return $wp_query->have_comments(); } /** * Iterate comment index in the comment loop. * * @since 2.2.0 * * @global WP_Query $wp_query WordPress Query object. */ function the_comment() { global $wp_query; if ( ! isset( $wp_query ) ) { return; } $wp_query->the_comment(); } /** * Redirect old slugs to the correct permalink. * * Attempts to find the current slug from the past slugs. * * @since 2.1.0 */ function wp_old_slug_redirect() { if ( is_404() && '' !== get_query_var( 'name' ) ) { // Guess the current post type based on the query vars. if ( get_query_var( 'post_type' ) ) { $post_type = get_query_var( 'post_type' ); } elseif ( get_query_var( 'attachment' ) ) { $post_type = 'attachment'; } elseif ( get_query_var( 'pagename' ) ) { $post_type = 'page'; } else { $post_type = 'post'; } if ( is_array( $post_type ) ) { if ( count( $post_type ) > 1 ) { return; } $post_type = reset( $post_type ); } // Do not attempt redirect for hierarchical post types. if ( is_post_type_hierarchical( $post_type ) ) { return; } $id = _find_post_by_old_slug( $post_type ); if ( ! $id ) { $id = _find_post_by_old_date( $post_type ); } /** * Filters the old slug redirect post ID. * * @since 4.9.3 * * @param int $id The redirect post ID. */ $id = apply_filters( 'old_slug_redirect_post_id', $id ); if ( ! $id ) { return; } $link = get_permalink( $id ); if ( get_query_var( 'paged' ) > 1 ) { $link = user_trailingslashit( trailingslashit( $link ) . 'page/' . get_query_var( 'paged' ) ); } elseif ( is_embed() ) { $link = user_trailingslashit( trailingslashit( $link ) . 'embed' ); } /** * Filters the old slug redirect URL. * * @since 4.4.0 * * @param string $link The redirect URL. */ $link = apply_filters( 'old_slug_redirect_url', $link ); if ( ! $link ) { return; } wp_redirect( $link, 301 ); // Permanent redirect. exit; } } /** * Find the post ID for redirecting an old slug. * * @since 4.9.3 * @access private * * @see wp_old_slug_redirect() * @global wpdb $wpdb WordPress database abstraction object. * * @param string $post_type The current post type based on the query vars. * @return int The Post ID. */ function _find_post_by_old_slug( $post_type ) { global $wpdb; $query = $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta, $wpdb->posts WHERE ID = post_id AND post_type = %s AND meta_key = '_wp_old_slug' AND meta_value = %s", $post_type, get_query_var( 'name' ) ); /* * If year, monthnum, or day have been specified, make our query more precise * just in case there are multiple identical _wp_old_slug values. */ if ( get_query_var( 'year' ) ) { $query .= $wpdb->prepare( ' AND YEAR(post_date) = %d', get_query_var( 'year' ) ); } if ( get_query_var( 'monthnum' ) ) { $query .= $wpdb->prepare( ' AND MONTH(post_date) = %d', get_query_var( 'monthnum' ) ); } if ( get_query_var( 'day' ) ) { $query .= $wpdb->prepare( ' AND DAYOFMONTH(post_date) = %d', get_query_var( 'day' ) ); } $key = md5( $query ); $last_changed = wp_cache_get_last_changed( 'posts' ); $cache_key = "find_post_by_old_slug:$key:$last_changed"; $cache = wp_cache_get( $cache_key, 'post-queries' ); if ( false !== $cache ) { $id = $cache; } else { $id = (int) $wpdb->get_var( $query ); wp_cache_set( $cache_key, $id, 'post-queries' ); } return $id; } /** * Find the post ID for redirecting an old date. * * @since 4.9.3 * @access private * * @see wp_old_slug_redirect() * @global wpdb $wpdb WordPress database abstraction object. * * @param string $post_type The current post type based on the query vars. * @return int The Post ID. */ function _find_post_by_old_date( $post_type ) { global $wpdb; $date_query = ''; if ( get_query_var( 'year' ) ) { $date_query .= $wpdb->prepare( ' AND YEAR(pm_date.meta_value) = %d', get_query_var( 'year' ) ); } if ( get_query_var( 'monthnum' ) ) { $date_query .= $wpdb->prepare( ' AND MONTH(pm_date.meta_value) = %d', get_query_var( 'monthnum' ) ); } if ( get_query_var( 'day' ) ) { $date_query .= $wpdb->prepare( ' AND DAYOFMONTH(pm_date.meta_value) = %d', get_query_var( 'day' ) ); } $id = 0; if ( $date_query ) { $query = $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta AS pm_date, $wpdb->posts WHERE ID = post_id AND post_type = %s AND meta_key = '_wp_old_date' AND post_name = %s" . $date_query, $post_type, get_query_var( 'name' ) ); $key = md5( $query ); $last_changed = wp_cache_get_last_changed( 'posts' ); $cache_key = "find_post_by_old_date:$key:$last_changed"; $cache = wp_cache_get( $cache_key, 'post-queries' ); if ( false !== $cache ) { $id = $cache; } else { $id = (int) $wpdb->get_var( $query ); if ( ! $id ) { // Check to see if an old slug matches the old date. $id = (int) $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts, $wpdb->postmeta AS pm_slug, $wpdb->postmeta AS pm_date WHERE ID = pm_slug.post_id AND ID = pm_date.post_id AND post_type = %s AND pm_slug.meta_key = '_wp_old_slug' AND pm_slug.meta_value = %s AND pm_date.meta_key = '_wp_old_date'" . $date_query, $post_type, get_query_var( 'name' ) ) ); } wp_cache_set( $cache_key, $id, 'post-queries' ); } } return $id; } /** * Set up global post data. * * @since 1.5.0 * @since 4.4.0 Added the ability to pass a post ID to `$post`. * * @global WP_Query $wp_query WordPress Query object. * * @param WP_Post|object|int $post WP_Post instance or Post ID/object. * @return bool True when finished. */ function setup_postdata( $post ) { global $wp_query; if ( ! empty( $wp_query ) && $wp_query instanceof WP_Query ) { return $wp_query->setup_postdata( $post ); } return false; } /** * Generates post data. * * @since 5.2.0 * * @global WP_Query $wp_query WordPress Query object. * * @param WP_Post|object|int $post WP_Post instance or Post ID/object. * @return array|false Elements of post, or false on failure. */ function generate_postdata( $post ) { global $wp_query; if ( ! empty( $wp_query ) && $wp_query instanceof WP_Query ) { return $wp_query->generate_postdata( $post ); } return false; } alse $data The returned oEmbed HTML (false if unsafe). * @param string $url URL of the content to be embedded. * @param string|array $args Optional. Additional arguments for retrieving embed HTML. * See wp_oembed_get() for accepted arguments. Default empty. */ return apply_filters( 'oembed_result', $this->data2html( $data, $url ), $url, $args ); } /** * Attempts to discover link tags at the given URL for an oEmbed provider. * * @since 2.9.0 * * @param string $url The URL that should be inspected for discovery `` tags. * @return string|false The oEmbed provider URL on success, false on failure. */ public function discover( $url ) { $providers = array(); $args = array( 'limit_response_size' => 153600, // 150 KB ); /** * Filters oEmbed remote get arguments. * * @since 4.0.0 * * @see WP_Http::request() * * @param array $args oEmbed remote get arguments. * @param string $url URL to be inspected. */ $args = apply_filters( 'oembed_remote_get_args', $args, $url ); // Fetch URL content. $request = wp_safe_remote_get( $url, $args ); $html = wp_remote_retrieve_body( $request ); if ( $html ) { /** * Filters the link types that contain oEmbed provider URLs. * * @since 2.9.0 * * @param string[] $format Array of oEmbed link types. Accepts 'application/json+oembed', * 'text/xml+oembed', and 'application/xml+oembed' (incorrect, * used by at least Vimeo). */ $linktypes = apply_filters( 'oembed_linktypes', array( 'application/json+oembed' => 'json', 'text/xml+oembed' => 'xml', 'application/xml+oembed' => 'xml', ) ); // Strip . $html_head_end = stripos( $html, '' ); if ( $html_head_end ) { $html = substr( $html, 0, $html_head_end ); } // Do a quick check. $tagfound = false; foreach ( $linktypes as $linktype => $format ) { if ( stripos( $html, $linktype ) ) { $tagfound = true; break; } } if ( $tagfound && preg_match_all( '#]+)/?>#iU', $html, $links ) ) { foreach ( $links[1] as $link ) { $atts = shortcode_parse_atts( $link ); if ( ! empty( $atts['type'] ) && ! empty( $linktypes[ $atts['type'] ] ) && ! empty( $atts['href'] ) ) { $providers[ $linktypes[ $atts['type'] ] ] = htmlspecialchars_decode( $atts['href'] ); // Stop here if it's JSON (that's all we need). if ( 'json' === $linktypes[ $atts['type'] ] ) { break; } } } } } // JSON is preferred to XML. if ( ! empty( $providers['json'] ) ) { return $providers['json']; } elseif ( ! empty( $providers['xml'] ) ) { return $providers['xml']; } else { return false; } } /** * Connects to an oEmbed provider and returns the result. * * @since 2.9.0 * * @param string $provider The URL to the oEmbed provider. * @param string $url The URL to the content that is desired to be embedded. * @param string|array $args Optional. Additional arguments for retrieving embed HTML. * See wp_oembed_get() for accepted arguments. Default empty. * @return object|false The result in the form of an object on success, false on failure. */ public function fetch( $provider, $url, $args = '' ) { $args = wp_parse_args( $args, wp_embed_defaults( $url ) ); $provider = add_query_arg( 'maxwidth', (int) $args['width'], $provider ); $provider = add_query_arg( 'maxheight', (int) $args['height'], $provider ); $provider = add_query_arg( 'url', urlencode( $url ), $provider ); $provider = add_query_arg( 'dnt', 1, $provider ); /** * Filters the oEmbed URL to be fetched. * * @since 2.9.0 * @since 4.9.0 The `dnt` (Do Not Track) query parameter was added to all oEmbed provider URLs. * * @param string $provider URL of the oEmbed provider. * @param string $url URL of the content to be embedded. * @param array $args Optional. Additional arguments for retrieving embed HTML. * See wp_oembed_get() for accepted arguments. Default empty. */ $provider = apply_filters( 'oembed_fetch_url', $provider, $url, $args ); foreach ( array( 'json', 'xml' ) as $format ) { $result = $this->_fetch_with_format( $provider, $format ); if ( is_wp_error( $result ) && 'not-implemented' === $result->get_error_code() ) { continue; } return ( $result && ! is_wp_error( $result ) ) ? $result : false; } return false; } /** * Fetches result from an oEmbed provider for a specific format and complete provider URL * * @since 3.0.0 * * @param string $provider_url_with_args URL to the provider with full arguments list (url, maxheight, etc.) * @param string $format Format to use. * @return object|false|WP_Error The result in the form of an object on success, false on failure. */ private function _fetch_with_format( $provider_url_with_args, $format ) { $provider_url_with_args = add_query_arg( 'format', $format, $provider_url_with_args ); /** This filter is documented in wp-includes/class-wp-oembed.php */ $args = apply_filters( 'oembed_remote_get_args', array(), $provider_url_with_args ); $response = wp_safe_remote_get( $provider_url_with_args, $args ); if ( 501 === wp_remote_retrieve_response_code( $response ) ) { return new WP_Error( 'not-implemented' ); } $body = wp_remote_retrieve_body( $response ); if ( ! $body ) { return false; } $parse_method = "_parse_$format"; return $this->$parse_method( $body ); } /** * Parses a json response body. * * @since 3.0.0 * * @param string $response_body * @return object|false */ private function _parse_json( $response_body ) { $data = json_decode( trim( $response_body ) ); return ( $data && is_object( $data ) ) ? $data : false; } /** * Parses an XML response body. * * @since 3.0.0 * * @param string $response_body * @return object|false */ private function _parse_xml( $response_body ) { if ( ! function_exists( 'libxml_disable_entity_loader' ) ) { return false; } if ( PHP_VERSION_ID < 80000 ) { /* * This function has been deprecated in PHP 8.0 because in libxml 2.9.0, external entity loading * is disabled by default, so this function is no longer needed to protect against XXE attacks. */ $loader = libxml_disable_entity_loader( true ); } $errors = libxml_use_internal_errors( true ); $return = $this->_parse_xml_body( $response_body ); libxml_use_internal_errors( $errors ); if ( PHP_VERSION_ID < 80000 && isset( $loader ) ) { // phpcs:ignore PHPCompatibility.FunctionUse.RemovedFunctions.libxml_disable_entity_loaderDeprecated libxml_disable_entity_loader( $loader ); } return $return; } /** * Serves as a helper function for parsing an XML response body. * * @since 3.6.0 * * @param string $response_body * @return stdClass|false */ private function _parse_xml_body( $response_body ) { if ( ! function_exists( 'simplexml_import_dom' ) || ! class_exists( 'DOMDocument', false ) ) { return false; } $dom = new DOMDocument(); $success = $dom->loadXML( $response_body ); if ( ! $success ) { return false; } if ( isset( $dom->doctype ) ) { return false; } foreach ( $dom->childNodes as $child ) { if ( XML_DOCUMENT_TYPE_NODE === $child->nodeType ) { return false; } } $xml = simplexml_import_dom( $dom ); if ( ! $xml ) { return false; } $return = new stdClass(); foreach ( $xml as $key => $value ) { $return->$key = (string) $value; } return $return; } /** * Converts a data object from WP_oEmbed::fetch() and returns the HTML. * * @since 2.9.0 * * @param object $data A data object result from an oEmbed provider. * @param string $url The URL to the content that is desired to be embedded. * @return string|false The HTML needed to embed on success, false on failure. */ public function data2html( $data, $url ) { if ( ! is_object( $data ) || empty( $data->type ) ) { return false; } $return = false; switch ( $data->type ) { case 'photo': if ( empty( $data->url ) || empty( $data->width ) || empty( $data->height ) ) { break; } if ( ! is_string( $data->url ) || ! is_numeric( $data->width ) || ! is_numeric( $data->height ) ) { break; } $title = ! empty( $data->title ) && is_string( $data->title ) ? $data->title : ''; $return = '' . esc_attr( $title ) . ''; break; case 'video': case 'rich': if ( ! empty( $data->html ) && is_string( $data->html ) ) { $return = $data->html; } break; case 'link': if ( ! empty( $data->title ) && is_string( $data->title ) ) { $return = '' . esc_html( $data->title ) . ''; } break; default: $return = false; } /** * Filters the returned oEmbed HTML. * * Use this filter to add support for custom data types, or to filter the result. * * @since 2.9.0 * * @param string $return The returned oEmbed HTML. * @param object $data A data object result from an oEmbed provider. * @param string $url The URL of the content to be embedded. */ return apply_filters( 'oembed_dataparse', $return, $data, $url ); } /** * Strips any new lines from the HTML. * * @since 2.9.0 as strip_scribd_newlines() * @since 3.0.0 * * @param string $html Existing HTML. * @param object $data Data object from WP_oEmbed::data2html() * @param string $url The original URL passed to oEmbed. * @return string Possibly modified $html */ public function _strip_newlines( $html, $data, $url ) { if ( ! str_contains( $html, "\n" ) ) { return $html; } $count = 1; $found = array(); $token = '__PRE__'; $search = array( "\t", "\n", "\r", ' ' ); $replace = array( '__TAB__', '__NL__', '__CR__', '__SPACE__' ); $tokenized = str_replace( $search, $replace, $html ); preg_match_all( '#(]*>.+?)#i', $tokenized, $matches, PREG_SET_ORDER ); foreach ( $matches as $i => $match ) { $tag_html = str_replace( $replace, $search, $match[0] ); $tag_token = $token . $i; $found[ $tag_token ] = $tag_html; $html = str_replace( $tag_html, $tag_token, $html, $count ); } $replaced = str_replace( $replace, $search, $html ); $stripped = str_replace( array( "\r\n", "\n" ), '', $replaced ); $pre = array_values( $found ); $tokens = array_keys( $found ); return str_replace( $tokens, $pre, $stripped ); } }